Ingham



MACHINE FOR COATING FABRICS Filed Aug. 26, 1921 mhmi atented Ug DANIEL D. FRO'IHING-HAM, F SALEM, AND RAIEH U. SA WYER, 0F WINCHESTER, MASSACHUSE'ITS, ASSIGNO'RS 'IO-SAWYEE PRODUCTS COMPANY, 01* WATERTOWN, MASSACHUSETTS, A CORPORATION OF MASSAGH'Q'SETTS.

irncnrnn non con'rrnc nannies.

Application filed August 26, 1921. Serial 1%. 195,575.

To all whom it may concern:

Be it known that we, DANIEL D. Fno'rn- INGHAM and RALPH I]. SAWYER, citizens of the United States, residing at Salem and Winchester, respectively, in the counties of Essex and Middlesex, respectively, and State of Massachusetts, have invented certain new and useful Improvements in Machines for Coating Fabrics; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to a machine I for coating fabrics. In the machine of the patent granted to us September 23, 1919, No. 1,316,784, fora machine for coating fabric, it has beenfound that the tension applied to the fabric by the tension roll varies somewhat while the machine is in operation. Thus, when the machine is first started up, the friction between the brake-strap and the brake-drum will be a certain amount, and after the machine has been running for awhile, the heating of the brake-drum and the strap will vary the amount of friction, as a consequence of which the tension on the fabric will be varied and the thickness of the coating will be changed. It is important, of course, to maintain a uniform thickness of coating, and the object of the present in- 7 vention is to improve coating machines by providing them with means for indicating the tension on the fabric. To the above end, the present invention consists in the improvement in coating machines hereinafter described and particularlydefined in the claims.

The accompanying drawing is a sectional elevation of a coating machine embodying the present improvement,

The illustrated embodlment of the invention is described as followsr-The roll of cloth 1 is supported on suitable bearings at one end of the machine, from which the web of cloth 2 passes around the guide roller 3 and then over the tension roll 4 covered with card clothing, and held from free rotation by a brake-strap hereinafter referred to. From the tension roll 4, the web passes under the guide roll 5, thence over the lateral. stretching roll 6, under the presser 7 and over the draw roll 8, and thence down into the oven 9, where it passes around the guide rolls 10 tanks 16 are filled with the coating material through a hole in the top normally hermeticallyclosed by a cap 17. Air pressure is supplied to the tank through the air-pressure supply pipe 18 so that thefstifi viscous coating material is pressed out through the supply pipe 15 and the nozzles 14: and is thus distributed upon the surface of the cloth. The pressure with which the cloth is applied to the presser 7 determines the thickness of the coating, and in coating a run of cloth it is highly desirable that the thiclmess of the coating be maintained uniform. It is also desirable, in coating one piece of cloth after another, that they all be given, if desired, the same thickness of coating. It has been a matter of some nicety for the operator to maintain the thickness of the coating uniform, owing to the variations in the friction the rock shaft 21 supported in bearings on the underside of the top members of the frame of the machine. A lever 22 secured to the rock shaft 21 extends in the opposite direction to the arms 20 from the rock shaft 21, and a cord 23 secured to the end of the lever 22'extends upward and is hooked onto the draw bar of a scale 24, supported by a rope 25 secured to any convenient place above the scale, as to a beam 26 in the ceiling'of the room. When the machine is in operation, the tension on the cloth is indicated by the reading of the scale 24 and by adding weights to the weight 27 on the end of the brake-strap 28, which embraces the friction drum 29 fastened to the tension roll 4, the tension of the cloth may be increased. The operator, by adding to or subtracting from the weight 21 may increase or decrease the tension on the cloth, due to va ing.

product is made by ed by the cloth on the brake-drum and brake-strap or otherwise. By adding to and subtracting from the weight 27, the tension on the cloth may be maintained uniform, which uniformity will be indicated by holding the reading on the scale at a certain predetermined figure.

While the invention is particularly desirable in connection with a machine like that of said patent, wherein the coating is made up of a single layer because the finished one passage of the cloth through the machine, the invention is capable of use in other kinds of coating machines where it is desired that the coating applied by passage of the cloth once through the machine shallhave a certain thickness, as a consequence of which the invention, viewed in its broader aspects, is not-limited to amachine applying a complete coating in a Sllfile layer.

aving thus described the invention, what is claimed is 1. A machine for coating fabrics having, in combination, a tension device and a draw roll cooperating with the fabric to maintain tension thereon, means for applying coating to the fabric between the tension roll and the draw roll and a guide roll between the coating applying means and the tension roll engaging a bight of the cloth' and means for indicating the pressure exertguide roll. 2. A machine for coating fabrics having, in combination, a tension device and a draw roll cooperating with the fabric to maintain tension thereon, anintermediate presser .bar between the tension roll and drawv roll, around and against which the fabric is nor mally pressed and held by the tension of the fabric, means for supplying coating material to the angle between the presser bar and the fabric, and means independent of the tension device for indicating the tension on the fabric.

3. A machine for coating fabrics having;

in combination, a presser, means fordrawing the fabric under tension around and in contact with the presser, means for applymg a mass of thick viscous coating material to the fabric in front of the presser, the course of the fabric and tension thereon bein ar been ranged so that, after the coating has reduced to the desired thickness, it is subjected to continued rubbing pressure against the presser, and independent means for indicating the tension under; which the fabric is drawn through the machine.

4. A machine for coating fabrics having, in combination, means for producing longitudinal tension on the fabric, means for supplying'a viscous coating material to the fa ric, means cooperating with said viscous coating material and fabric constructed to utilize the tension of the fabric to'reduce the coating to the desired thickness, and means independent of the tension producing means for indicating variations in the tension on the fabric.

5. A machine for coating fabrics having, in combination, a tension roll, a brake for the tension roll, a draw roll, means for a. plying coating to the material, a ide r0 1, a pair of arms supporting the guide roll, a lever connected with the arms, and an indicating instrument connected with the lever for measuring the tension on the fabric.

6. A machine for coating fabrics havin in combination, a tension device, a draw r0 1 for pulling the fabric throughthe machine, means for applying coating material to the fabric between the draw roll and the tension device, a roll for forming a bight in the fabric between the tension device and the coating applying means, and means for and the tension device ,for stretchmg the i fabric laterally before it is resented to the coating means, and a gui e roll around which the fabric is passed located between the tension device and the lateral stretching roll having provision for indicating the tension on the fabric chine.

DANIEL ID.- RALPH u; SAWYERU passing through the m9,-

FROTHINGHAM. 

